Right answer is (a) Tuberculosis
Explanation: When a person is lying down for long periods of time, the most commonly known problem that occurs is bed sores. However, long periods of bed rest also causes water to be slowly accumulated in the lungs. Due to the horizontal posture of the body, the body is not able to expel microorganisms as properly as it does in the vertical posture. The existing and accumulated water in the lungs becomes their breeding ground and the person suffers from tuberculosis.